JPH08318513A - Mold opening release type clamping apparatus for concrete mold - Google Patents

Abstract

PURPOSE: To prevent the occurrence of an erroneous operation and to release the mold by utilizing toggle action by guiding members to be clamped by the guide edges of the members to be clamped and releasably provided to be releasable without interference. CONSTITUTION: Since the end of a connecting rod 5 having a connecting and disconnecting pin 6 is dropped in a recess 11 in the state that members A, B to be clamped are separated from each other and the edge of the recess 11 at the mold clamping side becomes a movement preventing edge 10B, the movements of the pin 6 and a toggle lever 3 are restricted. Thus, an erroneous operation in which the lever 3 is rotated in a clamping direction while the members A, B remain open is prevented. When the members A, B are approached to each other from the state, the scooping edge 8C of a receptacle 8 is brought into contact with the pin 6 in the recess 11, and the pin 6 is raised by the edge 8C via the edge 10B. Then, the lever 3 is rotated in the mold clamping direction to engage the pin 6 with the hook 8A of the receptacle to clamp the members A, B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening device for a concrete block molding form, and a toggle type fastening device provided with an engaging / disengaging portion so that members to be fastened can be widely opened. The present invention relates to a mechanism for automatically engaging / disengaging the engaging / disengaging portion.

[0002]

2. Description of the Related Art As a fastening device for a concrete block forming frame, a toggle type fastening device utilizing a boosting force in the vicinity of the bottom dead center of a sliding crank mechanism is well known. The toggle type fastening device has the advantage that the fastening and releasing operations can be performed in one operation and the fastening force is also strong, but the mold opening stroke of the toggle lever (a member corresponding to the crank of the sliding mechanism) is It has the drawback of being limited by length. Therefore, a structure is adopted in which one end of the toggle lever or the connecting rod can be freely engaged and disengaged, and the engagement is released when the mold is wide open.

However, when manually engaging and disengaging,
It is necessary to perform the engagement / disengagement operation when the mold is wide open and prior to the mold clamping operation. In particular, one operating rod (a member corresponding to the crank shaft of the sliding crank mechanism) simultaneously operates a plurality of fastening devices. With such a structure, there is a problem that engaging and disengaging work is very troublesome.

Therefore, the inventor of this application has a structure in which the engaging / disengaging portion provided between the tip of the connecting rod and the receiving member is automatically disengaged by utilizing the movement of the tip of the connecting rod in the frame opening / closing direction. It has been proposed by the authors and is disclosed in Japanese Utility Model Publication No. 63-170109 and Japanese Utility Model Publication No. 3-106006.

The structure disclosed in Japanese Utility Model Laid-Open No. Sho 63-170109 is a structure in which the tip of a connecting rod is guided by a guide member having an inclined surface which is inclined downward. When the toggle lever is rotated in the fastening direction, the connecting rod is connected. When the tip of the rod moves upward along the inclined surface of the guide member to face the receiver, and when the rod rotates in the mold opening direction, it descends along the inclined surface so that it is not on the movement line of the receiver. It is the one.
However, since the fastening device having the above structure is configured to guide the tip of the connecting rod by utilizing its own weight,
It cannot be used for a fastening device in which the operating rod (the central axis of rotation of the toggle lever) is in the vertical direction, such as a fastening device for fastening the vertical sides of the side plate and the end plate of a large mold.

The structure disclosed in Japanese Utility Model Laid-Open No. 3-106006 solves this problem and employs a structure in which the tip of the connecting rod is guided by a long hole having an inclined portion. That is, instead of the inclined surface of the upper surface of the guide member of the device disclosed in Japanese Utility Model Laid-Open No. 63-170109, the tip of the connecting rod is guided by the inclined portion of the long hole provided in the guide plate. Automatic engagement / disengagement is also realized in a fastening device having a structure in which a lever rotates about a vertical axis.

[0007]

However, the above-mentioned conventional device has the following problems. The first problem is that the toggle lever of the fastening device can be freely moved even when the members to be fastened are greatly opened, so that the toggle lever is rotated in the fastening direction with the members being widely opened. When the members to be fastened are brought close to each other during the mold assembly, the back surface of the receiver (the surface facing the toggle lever side) collides with the tip of the connecting rod and the mold cannot be closed, and the work must be redone. Is a problem.

The second problem is that when the toggle lever is rotated in the mold opening direction, the tip of the connecting rod is displaced from the line of movement of the receiving member. The problem is that the molding surface cannot be released.

A large force is not usually required to move the members forming the mold frame in the separating direction at the time of mold opening, but at the beginning of the mold opening movement, that is, the concrete block in which the member to be opened is molded. When it is separated from the mold, a large force may be required due to the block surface and the molding surface of the mold being adhered to each other. In such a case, there is a case where it is desired to release the mold by utilizing the boosting action of the fastening device.
In the structure disclosed in Japanese Patent Publication No. 06-06, it is impossible to utilize the boosting action of the fastening device at the time of mold release.

A third problem is that regardless of whether the members to be fastened are slightly opened or widely opened, only the turning operation of the toggle lever causes the tip of the connecting rod to face the receiving member and the receiving member. There is a waste of movement because it swings between the disengaged position. Retracting the tip of the connecting rod from the line of movement of the receiver is necessary only when the members to be fastened are wide open, so the tip of the connecting rod retracts from the line of movement of the receiver only when the members are wide open. Is more rational and does not cause erroneous operation.

The present invention has been made to solve the above problems, and operates the fastening device with the members to be fastened open to collide the tip of the connecting rod with the receiver. In addition to preventing erroneous operation,
An object of the present invention is to obtain an automatic engagement / disengagement type fastening device that can perform mold release by utilizing the boosting action of the fastening device if necessary.

[0012]

The mold opening and detaching type fastening device for a concrete formwork of the present invention is a connecting rod at the tip of a toggle lever 3 pivotally supported on one of the fastened members A and B to be fastened to each other. The base end of 5 is pivotally attached, and the other fastened member B
Is provided with a receiving member 8 that engages and disengages with the tip of the connecting rod
Further, a guide member 9 extending from the one member A to the tip side of the connecting rod is provided, and the tip of the connecting rod 5 is guided by the guide member 9 to a position facing the receiving tool 8 to rotate the toggle lever 3. Therefore, both fastened members A,
In the concrete form fastening device for fastening B to each other, the guide member 9 is a first parallel guide edge that guides the tip of the connecting rod 5 in the moving direction of the other fastened member B in the initial stage of movement in the mold opening direction. 10A and the tip of the connecting rod 5 at the mold opening side end of the first parallel guide edge,
And a recess 11 that can be retracted to a position deviating from the movement line of 1. The edge of the recess 11 on the toggle lever 3 side is a first parallel guide edge 10A and a movement blocking edge 10B that is substantially right angle,
The receiver 8 has a second parallel guide edge 13B that guides the tip of the connecting rod 5 in parallel with the first parallel guide edge 10A on the extension line of the hook 13A that engages with the tip of the connecting rod 5 during fastening. The hook 13A and the scooping edge 13C are provided with a scooping edge 13C that extends obliquely in the same direction as the formation direction of the recess 11 from the end of the second parallel guide edge on the hook 13A side.
Between and are characterized in that the tip of the connecting rod 5 is opened with a width that allows passage.

[0013]

When the members A and B to be fastened are not greatly opened, the opening between the hook 13A of the receiving member 8 and the second parallel guide edge 13B is the first parallel guide edge 10A of the guide member 9.
The first parallel guide edge 10A and the second parallel guide edge 13B form a straight guide edge. When the toggle lever 3 is rotated in this state, the tip of the connecting rod 5 is moved to the first parallel guide edge 10A and the second parallel guide edge 13B.
It only moves back and forth between and.

In this case, the second parallel guide edge 13
By providing a stopper edge at the end of the mold opening side of B to prevent the tip of the connecting rod 5 from moving toward the mold opening side, after the tip of the connecting rod 5 contacts the stopper edge, the toggle lever 3 is further moved. By rotating in the mold opening direction, a releasing force can be applied between the fastened members A and B.

When the members A and B to be fastened are greatly opened while the toggle lever 3 is rotated in the mold opening direction, the second parallel guide edge 13B is separated from the first parallel guide edge 10A and the first parallel guide edge 10A is moved. When the recess 11 formed at the mold opening end coincides with the opening between the hook 13A and the scooping edge 13C of the receiving tool 8, the tip of the connecting rod 5 moves to the recess 11,
The hook 13A comes off the moving line. Therefore the hook 13
The members to be fastened A and B can be greatly opened without interfering with A and the connecting rod 5. The movement of the tip of the connecting rod 5 to the recess 11 is performed by using the weight of the connecting rod 5 or the biasing force of a spring if necessary.

Even if the toggle lever 3 is rotated in the mold clamping direction with the tip of the connecting rod 5 moving to the recess 11, the movement of the tip of the connecting rod 5 is blocked by the movement blocking edge 10B of the recess. Therefore, the toggle lever 3 cannot be rotated, and the toggle lever 3 is held at a fixed position.

When the members A and B to be fastened are moved in the approaching direction from the state where the members A and B are wide open, the scooping edge 1 of the receiving member 8 is moved.
3C guides the tip of the connecting rod 5 to the second parallel guide edge 13B side, and the tip of the connecting rod 5 moves to the second parallel guide edge 1B.
After being guided by 3B, the opening of the recess 11 and the opening between the hook 13A of the receiver 8 and the second parallel guide edge 13B become the second parallel guide edge 13B and the first parallel guide edge 10A. Will be closed. Therefore, thereafter, by rotating the toggle lever 3 in the mold clamping direction, the tip of the connecting rod 5 is guided by the second parallel guide edge 13B and the first parallel guide edge 10A to engage with the hook 13A, and the member to be fastened. Both A and B are concluded.

[0018]

1 to 7 show a first embodiment of the present invention. Members A and B to be fastened to each other
On one side A, an operating rod 2 is rotatably supported by a bracket 1, and a toggle lever 3 is fixed to the operating rod. A base end of a connecting rod 5 is pivotally attached by a connecting pin 4 to the tip of the toggle lever. The base end side of the connecting rod 5 is a U-shaped plate 5B which avoids the interference between the connecting rod 5 and the operating rod 2 and contacts the operating rod 2 to define the turning end of the toggle lever 3 in the mold clamping direction. Has become. An engagement / disengagement pin 6 in a direction parallel to the operating rod 2 is attached to the tip of the connecting rod 5 in a state of protruding to both sides. The tip of the connecting rod 5 is
It is a screw rod, and is inserted into a through hole in the center of the engaging / disengaging pin 6 in the direction perpendicular to the axis.
The engagement / disengagement pin 6 is fixed to the tip of the connecting rod 5 by tightening the engagement / disengagement pin 6. The other side of the fastened member B
A receiver 8 having a hook 9 that engages with the engagement / disengagement pin 6 is fixed to the.

The receiving member 8 is composed of two plates located on both sides of the tip of the connecting rod 5, and further outside thereof, a guide plate 9 fixed to one member A to be fastened is located. As shown in FIG. 3, the guide plate 9 has a first parallel guide edge 10A parallel to the mold opening movement direction of the member B to be fastened, and a movement blocking edge 10B bent at a right angle from the die opening side end. Guide hole 10 is provided,
The end portion on the mold opening side that is bent in the L shape is a recess 11. Both ends of the engagement / disengagement pin 6 at the tip of the connecting rod 5 pass through the guide holes 10 of the guide plates provided on both sides of the connecting rod 5, and the outside of the guide pin 10 is detached from the guide hole 10. A washer 12 is provided to prevent it.

As shown in FIG. 4, the receiver 8 has a hook 13
A second parallel to the first parallel guide edge 10A on the side facing A
It has a concave guide groove 13 with parallel guide edges 13B. A scooping edge 13C extending obliquely downward from the hook side end of the second parallel guide edge 13B is formed, and an opening 14 through which the engagement / disengagement pin 6 can pass is present between the scooping edge 13C and the hook 13A. There is.

The recess 15 on the left side of the guide plate 9 in FIG.
Is for positioning when the guide plate is welded to the member A to be fastened, and the guide plate 9 is welded to the member A to be fastened with the recess 15 applied to the operating rod 2. Further, the receiving tool 8 is welded to the member B such that the second parallel guide edge 13B is flush with the first parallel guide edge 10A of the guide plate.

5 and 7 show the operation of the fastening device having the above structure. In the fastening state shown in FIG. 5, the engagement / disengagement pin 6 moves by being guided by the first parallel guide edge 10A of the guide hole 10 of the guide plate, and engages with the hook 13A when the toggle lever 3 rotates to the fastening end. Then, the members to be fastened A and B are fastened to each other.

FIG. 6 shows a state in which the fastening is released. In this state, the engagement / disengagement pin 6 has moved to the vicinity of the mold opening side end of the guide hole 10 of the guide plate. At this time, the engagement / disengagement pin 6 comes to the position of the recess 11 of the guide hole, but since the second parallel guide edge 13B of the receiver 8 guides the engagement / disengagement pin 6, the engagement / disengagement pin 6 is Recess 1
Do not move to 1. When the fastening device is simply fastened and released, the engagement / disengagement pin 6 only reciprocates between the positions shown in FIGS. 5 and 6, and does not come off from the movement line of the hook 13A.

Further, when the toggle lever 3 is further rotated to the left in the figure from the state of FIG. 6, the engagement / disengagement pin 6 that moves further to the right from the state of FIG. 6 has the bottom portion 13 of the guide groove 13 of the receiver.
If a margin 10C (see FIG. 8) is provided at the mold opening side end of the guide hole 10 of the guide plate so as to push the D (stopper edge), the toggle lever 3 is received by the rotation in the mold opening direction. The tool 8 can be pushed in the mold opening direction to generate a releasing force between the members A and B to be fastened.

When the members A and B to be fastened are separated from each other in the state shown in FIG. 6 in which the fastening device is released, the recess 11 is opened by the spacing between the guide plate 9 and the receiving member 8. That is, when the opening 14 between the hook 13A of the receiver 8 and the scooping edge 13C coincides with the recess 11 of the guide hole 10, the engagement / disengagement pin 6 moves to the recess 11 side. In this state, the engagement / disengagement pin 6 is the hook 1
Since it deviates from the line of movement of 3A, the members A and B to be fastened can be widely opened as shown in FIG.

In the state shown in FIG. 7, the engagement / disengagement pin 6, that is, the tip of the connecting rod 5 is in a state of falling into the recess 11, and the edge of the recess 11 on the mold clamping side is the first parallel guide edge. Since the movement preventing edge 10B is substantially orthogonal to 10A, even if the toggle lever 3 is tried to be turned in this state, the toggle lever 3 cannot be turned. Therefore, in the state of FIG. 7 in which the members to be fastened A and B are greatly separated from each other, the movements of the engagement and disengagement pin 6 and the toggle lever 3 are restricted, and the members to be fastened A and B are kept open to each other.
It is possible to prevent an erroneous operation such as rotating the gear in the fastening direction.

When the members A and B to be fastened are brought close to each other from the state shown in FIG. 7, the scooping edge 13C of the receiving member 8 abuts on the engagement / disengagement pin 6 in the recess 11, and the movement preventing edge 10B moves the mold clamping side. The engagement / disengagement pin 6 which is prevented from moving is picked up by the scooping edge 13C, and the state shown in FIG. 6 is obtained. Then, by rotating the toggle lever 3 in the mold clamping direction thereafter, the engagement / disengagement pin 6 engages with the hook 13A of the receiving tool, and the fastened members A and B are fastened as shown in FIG.

[0028]

According to the fastening device of the present invention described above,
Unless the members to be fastened are wide open, the tip of the connecting rod will not retract from the line of movement of the receiver, and when the members are wide open, the tip of the connecting rod will retract from the line of movement of the receiver. At the same time, movement of the tip of the connecting rod in the fastening direction is blocked, and the toggle lever cannot rotate in the fastening direction. That is, in the fastening device of the present invention, the tip of the connecting rod is retracted and the retracted state is maintained only when necessary, so that there is no waste in operation and erroneous operation can be prevented.

Further, in the structure of the present invention, there is an effect that it is possible to easily realize the structure in which the releasing force is applied to the members A and B by utilizing the boosting action of the toggle.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a diagram showing a guide plate.

FIG. 4 is a diagram showing a receiver.

FIG. 5 is a side view of the fastening state.

FIG. 6 is a side view of the fastening release state.

FIG. 7 is a side view when the members to be fastened are wide open.

FIG. 8 is a view showing another embodiment of the guide plate.

[Explanation of symbols]

 3 Toggle lever 5 Connecting rod 8 Receiver 9 Guide plate 10A 1st parallel guide edge 10B Movement prevention edge 11 Recess 13A Hook 13B 2nd parallel guide edge 13C Scooping edge

Claims (1)

[Claims] 1. A connecting rod at a tip of a toggle lever (3) pivotally supported on one (A) of members (A, B) to be fastened to each other.
The proximal end of (5) is pivotally attached, and the other fastened member (B) is provided with a receiving member (8) that engages and disengages with the tip of this connecting rod. A guide member (9) extending toward the tip side is provided, and the tip of the connecting rod (5) is guided by the guide member (9) to a position facing the receiver (8) to rotate the toggle lever (3). Thus, in the concrete form fastening device that fastens both fastened members (A, B) to each other, the guide member (9) causes the tip of the connecting rod (5) to move to the other fastened member at the initial stage of movement in the mold opening direction. Fastening member
A first parallel guide edge (10A) for guiding in the moving direction of (B),
Connecting rod (5) at the mold opening side end of the first parallel guide edge
It is equipped with a recess (11) that allows the tip of the recess to be retracted to a position away from the movement line of the receiver (8), and the toggle lever of this recess (11)
The edge on the (3) side is a movement blocking edge (10B) that is substantially perpendicular to the first parallel guide edge (10A).
A second parallel guide edge (13B) for guiding the tip of the connecting rod (5) parallel to the first parallel guide edge (10A) on the extension line of the hook (13A) engaging with the tip of (5) in the mold opening direction. A scooping edge (13C) extending obliquely from the end of the second parallel guide edge on the hook (13A) side in the same direction as the formation direction of the recess (11),
A mold opening and closing type fastening device for a concrete formwork, characterized in that the hook (13A) and the scooping edge (13C) are opened with a width that allows the tip of the connecting rod (5) to pass therethrough.